Overclock.net › Forums › Industry News › Hardware News › [Lab501] GTX590 VRMs analyzed
New Posts  All Forums:Forum Nav:

[Lab501] GTX590 VRMs analyzed

post #1 of 207
Thread Starter 
Quote:
We have five phases for each GPU, making the ICs from Infineon TDA21211 DR.MOS sites, supporting a peak current of 35 A and therefore use inducers 35A had to be at least enough not to touch before mosfetii the 35A. I do not have specifications for those inducers, but to give you an idea I can tell you that high quality inductors on Asus RE3 supports a peak current of 40 amps and are more than three times higher. We have very fragile Dr.Mos chips (currently available IC's Dr.Mos 50 amps) and not very efficient in energy conversion, and mini-inducers, which anyway would be made redundant more than 30A mosfet, a combination very-very poor, I never thought I'll ever see it on a motherboard of this caliber.
http://translate.google.com/translat...rclocking%2F12

He talks earlier, and I agree, that the minimum we would have liked to see would be a six phase VRM with 40A+ mosfets (maximum theoretical load: 240A). Instead we get a four phase VRM with 35A mosfets (maximum theoretical load: 140A).

The reference HD6990 uses a six phase VRM with each phase capable of 80A (maximum theoretical load: 480A).



Higher the current rating of the mosfets used in the phases, the more current is available to the GPUs. Current increases directly as clock speed. If the components are rated too low the GPU can draw too much power and cause the mosfet to fail. Additionally, more phases means cleaner power, which means easier overclocking.

Also, in case anyone brings up VI=P and argues that higher voltage means lower current, remember that in a switching power supply the forward voltage of the transistors remains constant, and that output voltage is determined by the inductor and the duty cycle of the transistors. Higher output voltage means a higher duty cycle of the switching transistors, means that that high current levels are sustained for longer.
Edited by Phaedrus2129 - 3/31/11 at 10:02am

Gear mentioned in this thread:

post #2 of 207
Guess this kind of says it all, really. NVIDIA skimped on the power management area in order to save money and push this thing out quickly. If it wasn't enough on the 570 how would the design work on a card with 2 full GF110 cores?. :disappointface:
Edited by Razi3l - 3/31/11 at 8:28am
    
CPUMotherboardGraphicsRAM
i5-2500k @ 4300Mhz Biostar TP67XE Waiting to buy a new one 8GB 1600Mhz 7-8-7-21 1T 
Hard DriveCoolingOSMonitor
Samsung 840 SSD [250GB] Antec H20 620 Windows 7 x64 Acer S242HL 
PowerCase
Thermaltake 775W NZXT Phantom [White] 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5-2500k @ 4300Mhz Biostar TP67XE Waiting to buy a new one 8GB 1600Mhz 7-8-7-21 1T 
Hard DriveCoolingOSMonitor
Samsung 840 SSD [250GB] Antec H20 620 Windows 7 x64 Acer S242HL 
PowerCase
Thermaltake 775W NZXT Phantom [White] 
  hide details  
Reply
post #3 of 207
Why would they cheap out on such a component, on their highest end card?
post #4 of 207
Just like the 570s
Stealth Assassin
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 6600K Asus ROG Maximus VIII Hero Alpha EVGA 980ti Classified  Corsair LPX DDR4 3000 
Hard DriveCoolingCoolingCooling
Samsung 850 Pro Noctua D15s Cooler Master Silencio PWM 120MM 2400RPM Cooler Master Silencio PWM 120MM 1400RPM 
OSMonitorKeyboardPower
Windows 10 Samsung Curved S34E790C Corsair Strafe RGB EVGA SuperNOVA P2 650w 
CaseMouseAudioAudio
Master Case 5 Corsair Scimitar Sennheiser HD 558 Corsair Void USB 
  hide details  
Reply
Stealth Assassin
(16 items)
 
  
CPUMotherboardGraphicsRAM
i5 6600K Asus ROG Maximus VIII Hero Alpha EVGA 980ti Classified  Corsair LPX DDR4 3000 
Hard DriveCoolingCoolingCooling
Samsung 850 Pro Noctua D15s Cooler Master Silencio PWM 120MM 2400RPM Cooler Master Silencio PWM 120MM 1400RPM 
OSMonitorKeyboardPower
Windows 10 Samsung Curved S34E790C Corsair Strafe RGB EVGA SuperNOVA P2 650w 
CaseMouseAudioAudio
Master Case 5 Corsair Scimitar Sennheiser HD 558 Corsair Void USB 
  hide details  
Reply
post #5 of 207
Quote:
Originally Posted by Phaedrus2129 View Post
http://translate.google.com/translat...rclocking%2F12

He talks earlier, and I agree, that we would have liked to see a six phase VRM with 40A+ mosfets (maximum theoretical load: 240A). Instead we get a four phase VRM with 35A mosfets (maximum theoretical load: 140A).

The reference HD6990 uses a six phase VRM with each phase capable of 80A.
80A nice
Intel Killer
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD 8320 4.4ghz Gigabyte 990fx XFX R9 290 (1100/1250) 8GB DDR3 1866 
Hard DriveCoolingOSMonitor
750GB Momentus XT Corsair H80i Windows 8 3x 23" 1080p 
KeyboardPower
Logitech Mk 710 OCZ 1000 watts 
  hide details  
Reply
Intel Killer
(14 items)
 
  
CPUMotherboardGraphicsRAM
AMD 8320 4.4ghz Gigabyte 990fx XFX R9 290 (1100/1250) 8GB DDR3 1866 
Hard DriveCoolingOSMonitor
750GB Momentus XT Corsair H80i Windows 8 3x 23" 1080p 
KeyboardPower
Logitech Mk 710 OCZ 1000 watts 
  hide details  
Reply
post #6 of 207
Quote:
Originally Posted by linkin93 View Post
Why would they cheap out on such a component, on their highest end card?
Why to save $0.35 a card of course! (made up number )

I can't believe that on a card this pricey they cheeped out on it. Makes me want to go with AMD for my next purchase.
ColdCut
(14 items)
 
YetiKube
(19 items)
 
 
CPUMotherboardGraphicsRAM
5960x Asus Rampage V Extreme  XFX 295x2 Core Hydro Edition CORSAIR Vengeance LPX 16GB DDR4 2800 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 850 Pro  Samsung 850 EVO Western Digital Black 3TB  LG Bluray Burner 16x 
CoolingOSMonitorPower
H110i GT Windows 8.1 Pro Asus 4k Corsair AX1500i  
CaseAudio
Corsair 900D Stock 
CPUMotherboardGraphicsRAM
(1) 2500K ASRock Extreme3 Gen3 GTX 780 Classified Mushkin 996995 DDR3 1600 (2 Sticks) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro (1) 150GB Western Digital Raptor (1) 1TB Western Digital Black Caviar (1) Samsung SATA DVD Burner 
CoolingOSMonitorKeyboard
Antec Kuhler H2O 620 Windows 8.1 LG 21:9 Ultrawide 34" 3440x1440 Filco 114 key (Blue Cherry) / HHKB Pro 2 
PowerCaseMouseMouse Pad
Corsair HX850W - 850W Mountain Mods - U2 UFO Orginal - Gloss Black Logitech G400 / Razer Deathadder BE Razer Goliathus Extended / Artisan Hien VE (Sof... 
AudioOtherOther
Creative Sounds Blaster X-FI Titanium HD Asus USB N-53 Wireless USB adapter  12 Case Fans 
  hide details  
Reply
ColdCut
(14 items)
 
YetiKube
(19 items)
 
 
CPUMotherboardGraphicsRAM
5960x Asus Rampage V Extreme  XFX 295x2 Core Hydro Edition CORSAIR Vengeance LPX 16GB DDR4 2800 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 850 Pro  Samsung 850 EVO Western Digital Black 3TB  LG Bluray Burner 16x 
CoolingOSMonitorPower
H110i GT Windows 8.1 Pro Asus 4k Corsair AX1500i  
CaseAudio
Corsair 900D Stock 
CPUMotherboardGraphicsRAM
(1) 2500K ASRock Extreme3 Gen3 GTX 780 Classified Mushkin 996995 DDR3 1600 (2 Sticks) 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 840 Pro (1) 150GB Western Digital Raptor (1) 1TB Western Digital Black Caviar (1) Samsung SATA DVD Burner 
CoolingOSMonitorKeyboard
Antec Kuhler H2O 620 Windows 8.1 LG 21:9 Ultrawide 34" 3440x1440 Filco 114 key (Blue Cherry) / HHKB Pro 2 
PowerCaseMouseMouse Pad
Corsair HX850W - 850W Mountain Mods - U2 UFO Orginal - Gloss Black Logitech G400 / Razer Deathadder BE Razer Goliathus Extended / Artisan Hien VE (Sof... 
AudioOtherOther
Creative Sounds Blaster X-FI Titanium HD Asus USB N-53 Wireless USB adapter  12 Case Fans 
  hide details  
Reply
post #7 of 207
lol. yeah i installed one of these in a friends machine. died bone stock. luckily newegg is still very supportive of its customers and let us swap for the 6990.

ive since been talking everone i encounter out of the 590. including my grandmother.
post #8 of 207
Quote:
Originally Posted by linkin93 View Post
Why would they cheap out on such a component, on their highest end card?
because its cheaper... that way they could actually make an "affordable" dual chip card useing two massive cost GPU's
White Parvum
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 3770k GigaByte Sniper G1 M3 VTX3D HD 7990 DDR3 16GB 
Hard DriveHard DriveCoolingOS
128GB ADATA S511 2 x 1TB Samsung M8 Water Cooling. Alphacool / EK Windows 7 64bit 
MonitorMonitorKeyboardPower
Hazro 30" 2560x1600 YAMAKASI Catleap Q270 LED Logitech G19 XFX 1KW Platinum Pro 
CaseMouseMouse Pad
Parvum S1.0 Logitech G5 OCUK XXXL 
  hide details  
Reply
White Parvum
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 3770k GigaByte Sniper G1 M3 VTX3D HD 7990 DDR3 16GB 
Hard DriveHard DriveCoolingOS
128GB ADATA S511 2 x 1TB Samsung M8 Water Cooling. Alphacool / EK Windows 7 64bit 
MonitorMonitorKeyboardPower
Hazro 30" 2560x1600 YAMAKASI Catleap Q270 LED Logitech G19 XFX 1KW Platinum Pro 
CaseMouseMouse Pad
Parvum S1.0 Logitech G5 OCUK XXXL 
  hide details  
Reply
post #9 of 207
Quote:
Originally Posted by Xinoxide View Post
lol. yeah i installed one of these in a friends machine. died bone stock. luckily newegg is still very supportive of its customers and let us swap for the 6990.

ive since been talking everone i encounter out of the 590. including my grandmother.
You have an awesome grandma!
    
CPUMotherboardGraphicsRAM
Intel i7 6850K 4.3GHz (100x43) 1.355v Evga X99 Classified BIOS 2.03 Gigabyte Aorus Xtreme 1080ti G.SKILL 4x4GB 3200MHz 16-16-16-36 1T 1.35v 
Hard DriveOptical DriveCoolingOS
Samsung SM961 1TB NVMe + 1TB Samsung 840 Evo External Asus drive 2x MCP655 in independent loops Windows 7 Pro 64-bit 
MonitorKeyboardPowerCase
Philips BDM4065UC 40" 4K Logitech G19 Evga 1200 P2 Enthoo Pro M 
MouseAudio
Logitech G900 Asus Essence XT II PCIe 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel i7 6850K 4.3GHz (100x43) 1.355v Evga X99 Classified BIOS 2.03 Gigabyte Aorus Xtreme 1080ti G.SKILL 4x4GB 3200MHz 16-16-16-36 1T 1.35v 
Hard DriveOptical DriveCoolingOS
Samsung SM961 1TB NVMe + 1TB Samsung 840 Evo External Asus drive 2x MCP655 in independent loops Windows 7 Pro 64-bit 
MonitorKeyboardPowerCase
Philips BDM4065UC 40" 4K Logitech G19 Evga 1200 P2 Enthoo Pro M 
MouseAudio
Logitech G900 Asus Essence XT II PCIe 
  hide details  
Reply
post #10 of 207
Quote:
Originally Posted by jjpctech View Post
because its cheaper... that way they could actually make an "affordable" dual chip card useing two massive cost GPU's
When its their flag ship card, its difficult to make that arguement. And if they did... it will cost more to fix it now than it would of to do it right the first time.
Ghost
(14 items)
 
  
CPUMotherboardGraphicsRAM
2500K 4.4 @ 1.264 ASUS P8P67 Deluxe Saphire 5850 Kingston HyperX Gensis 8Gb 8-8-8-22 @ 1333 
Hard DriveHard DriveOSMonitor
Kingston RealSSD 1TB WD1002FAEX 6gps 64m Cache Windows 7 64bit Acer H233H 
PowerCaseMouse
Corsair HX750 Fractal Define R3 Black Razer Mamba 
  hide details  
Reply
Ghost
(14 items)
 
  
CPUMotherboardGraphicsRAM
2500K 4.4 @ 1.264 ASUS P8P67 Deluxe Saphire 5850 Kingston HyperX Gensis 8Gb 8-8-8-22 @ 1333 
Hard DriveHard DriveOSMonitor
Kingston RealSSD 1TB WD1002FAEX 6gps 64m Cache Windows 7 64bit Acer H233H 
PowerCaseMouse
Corsair HX750 Fractal Define R3 Black Razer Mamba 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Hardware News

Gear mentioned in this thread:

Overclock.net › Forums › Industry News › Hardware News › [Lab501] GTX590 VRMs analyzed